Improvement in automatic telegraph-transmitters



`v` @incassa N'GfLlTTLL Improvement vinlAutomamtiC Telgraph; Transmitters.

No. 129,839. YNimm-Jury23,1872.

, 1 l h -wiring@ L f l l. /,`i'-NVENTOR l but Whe GEORGE LITTLE, on nurnnnnonnrnnir, NEW JERSEY.

IMPROVEMENT IN AUTOMATIC TELEGRAPHTRANSMITTERS.

Specification forming part of Letters Patent No. 129,@39, dated July 23,1872.

\ paper adhere to the small rollers or to the drum. In either instance the circuit is not properly closed through the perforationsin the paper, and imperfect writing is the result. My present inventionis for availing of ,the thickness of the paper to break the mhi'n circuit, and the absence thereof at the perforation to allow a :motion that closes the circuit 5, thereby `the circuit is made and broken at two points simultaneously, one through the perforation of the paper, and the other simultaneously at a separate point by the movement of the lever carrying such roller, so as to insure great ref` e liability in transmitting the message.

In the drawing, Figure lis a side View of the transmitting mechanism, and Fig. 2 is an elevation edgewise of the transmitting-drum.

The drum a is to be supported in suitable bearings and revolved by suitable power. The small rollers t' 0 are upon levers b c that have their fulcrums upon the standard d. The insulated circuit-closers ef are adjustable, and

their ends contiguous to the endsof the springlevers b c. The circuit-closers may also be made `elastic or yielding. If the battery is connected to the standard d and the line-wire to the bearings of the drum a, there will be a circuit established through the standard d, levers b c, rollers 'i o, and drum a, when there is not any paperintervenin g between the rollers `o t' andgdrum, or when a perforation allowsof.;

the coitact of the rollers 'i or o and1a, th`is" portion beingvsubstantially the same asusual 5 thickness of the paper intervenes c are moved to break the circuit at the closers e f, but as the rollers fall into the holes in the paper, as that is drawn along, the circuit is closed at e or j simultaneously with the contact of i or o with a; hence, there being two points of contact, great perfection in transmitting is insured, even if one or the other of the points of contact may be defectf ive. The rollers z' o may be one in advance of the other, and if but one line of perforation is used in the paper only one roller, t', with its le ver and circuit-closer, is required, and the wire 'm will connect from e to the mainline; and if two rows of perforations are required the same connection will be sufficient; but if a reverse circuit is used at one row of perforations, the

case the circuit Will be closed by the lever b orlc at e or f only, and, if desired, a convex surface or trough may take the place of the roller a. In all cases the thickness of the paper moves the circuit-closers. The guide-plates 1^ s may be made as latches to hold the levers b` c back While the paper is being inserted beneath the rollers t o, or turning-buttons or cams at t may be used to force back the levers b c for the same purpose. The levers b c may either stand vertical or horizontal.

I claim as my invention- The circuit-closer e orf and lever b or c, in combination with the roller t or o, drum a, and connections, substantially as specified, for closing and breaking a circuit to the main line `at two points by the perforated pa'per simultaneously, substantially as set forth.

Signed by me this 20th day of June, A. D.

GEORGE LITTLE.

Witnesses GEO. T. PINGKNEY, (Enns. H. SMITH. 

